... The Technician's Basic Tool: The Price Chart By Mark Etzkorn Whether you trade short-term or long-term, discretionary ... techniques can be roughly divided in two categories: chart analysis and technical indicators. Because basic chart analysis is the backbone of technical trading, we'll explain the most popular ... used in technical indicator calculations. • Range. The difference between two specific price levels, most commonly the high and low of a given period. For example, the daily range is the difference...